Customized Yarn

To add a novelty look to your knitting try combining your yarn with a colored thread. The thread will naturally wind around the yarn as you knit, creating a bumpiness. There are many novelty threads available for quilting, some are shiny or springy, some in variegated or changing colors. Knitting a thread with a yarn that tends to stretch, such as pure alpaca, can also stabilize the finished work and support the yarn.

Yarn Weights

If you have the perfect pattern but not quite the right yarn to get started, use this general guide:
If you double lace weight yarn, you’ll get close to sport weight;
Doubling fingering weight gives DK weight;
Doubling sport weight gives worsted weight;
Doubling worsted weight gives super bulky weight.
Or you could use the problem as an excuse to go yarn shopping!

Right Direction for Fiber

When you are working with yarn and threads, they have a "right" way direction. When you pull the yarn from the middle of the skein, the threads coming from the yarn are going downward when you run your fingers down the yarn and will feel smooth. This is usually the right direction to work with the yarn.
If you take the other tail and run your fingers down the yarn you will see lots of tails sticking out and it will feel a little rougher. Using the yarn in this direction makes it more likely to twist and knot. Yarn can be used in either direction, just be aware and always use the yarn in the same direction for multiple skein projects.